<template>
	<view>
		<view class="search-box">
			<uni-search-bar :focus="true" cancelButton="none" :radius="100" @input="input" ></uni-search-bar>
		</view>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length!==0">
			<view class="sugg-item" v-for="(item,index) in searchResults" :key="index" @click="gotoDetail(item)">
				<view class="goods-name">
					{{item.goods_name}}
				</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else='searchResults.length===0'>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons @click="clean" type="trash" size="16"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item,index) in histories" :key="index"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//延时器的 timerID
				timer:null,
				//搜索关键字
				kw:'',
				//搜索的结果列表
				searchResults:[],
				//搜索历史的数组
				historyList:[]
			};
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		},
		onLoad() {
			this.historyList=JSON.parse(uni.getStorageSync('kw')||'[]')
		},
		gotoGoodsList(){
			uni.navigateTo({
				url:'/subpkg/goods_list/goods_list?query='+item
			})
		},
		methods:{
			clean(){
				this.historyList=[]
				uni.setStorageSync('kw','[]')
			},
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList=Array.from(set)
				
				//对搜索历史数据持久化
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			gotoDetail(item){
				console.log(item.goods_id);
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
				})
			},
			//input输入事件
			input(e){
				clearTimeout(this.timer)
				this.timer=setTimeout(()=>{
					this.kw=e
					this.getSearchResults()
				},500)
			},
			getSearchResults(){
				if(this.kw.length===0){
					this.searchResults=[]
					return
				}
				var that =this
				uni.request({
					url:'https://www.uinav.com/api/public/v1/goods/qsearch',
					method:'GET',
					data:{query:this.kw},
					success({data:res}) {
						that.searchResults=res.message
						that.saveSearchHistory()
					},
					fail() {
						uni.showToast({
							title:'请求失败',
							icon:'none'
						})
					}
				})
			}
		}
	}
</script>

<style lang="scss">
	.search-box{
		position: sticky;
		top: 0%;
		z-index: 999;
	}
	.sugg-list{
		padding: 0 5px;
		.sugg-item{
			display: flex;
			align-items: center;
			justify-content: space-around;
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			.goods-name{
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
			}
		}
	}
	
	.history-box{
		padding: 0 5px;
		.history-title{
			display: flex;
			justify-content: space-between;
			margin: 5px 0;
			border-bottom: 1px solid #efefef;
			height: 40px;
			align-items: center;
			font-size: 13px;
		}
		
		.history-list{
			display: flex;
			flex-wrap: wrap;
			
			.uni-tag{
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
	
</style>
